Terris M K, Stamey T A
Department of Urology, Stanford University, California.
J Urol. 1991 May;145(5):984-7. doi: 10.1016/s0022-5347(17)38508-7.
Estimation of prostate gland volume with transrectal ultrasound may provide important information in the evaluation of benign and malignant prostatic diseases. To determine the most accurate means of volume estimation 150 patients underwent transrectal ultrasound with 15 separate methods of volume estimation. All patients underwent subsequent radical prostatectomy or cystoprostatectomy. Prostate specimen weights were compared with the results of each volume estimation method. Step-section planimetry, previously assumed to be the most accurate means of volume measurement, exhibited a Pearson correlation coefficient of 0.93. The elliptical volume, widely used as an alternative to planimetry, demonstrated a correlation coefficient of 0.90. The most accurate method to estimate prostate weight (r = 0.94) was a variation of the prolate spheroid formula, expressed as pi/6 (transverse dimension)2 (anteroposterior dimension). When different volume ranges were considered, this prolate spheroid formula provided the closest estimate of weight in glands of less than 40 gm. and those in the 40 to 80 gm. range. The most accurate method to estimate prostates weighing greater than 80 gm. was the formula pi/6 (transverse dimension)3.
经直肠超声估算前列腺体积可为评估前列腺良恶性疾病提供重要信息。为确定最准确的体积估算方法，150例患者接受了经直肠超声检查，采用15种不同的体积估算方法。所有患者随后均接受了根治性前列腺切除术或膀胱前列腺切除术。将前列腺标本重量与每种体积估算方法的结果进行比较。此前被认为是最准确体积测量方法的阶梯切片平面测量法，其皮尔逊相关系数为0.93。广泛用作平面测量替代方法的椭圆体积法，相关系数为0.90。估算前列腺重量最准确的方法（r = 0.94）是长椭球体公式的一种变体，表示为π/6（横向尺寸）²（前后尺寸）。当考虑不同体积范围时，这种长椭球体公式在小于40克以及40至80克范围内的腺体中提供了最接近的重量估算值。估算重量大于80克的前列腺最准确的方法是公式π/6（横向尺寸）³。
